<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const obj = {
            age: 18
        };
        function fn(x, y) {
            console.log(this);
            console.log(x + y);
        };
        const foo = fn.bind(obj, 2, 3);
        console.log(foo);
        foo();
    </script>
</body>

</html>